A sharp knife is your best friend in the kitchen – it makes cooking both safer and more efficient. But how do you know if your knife is still up to par? Here are five smart and easy ways to test its sharpness.

1. The thumb test – A classic for quick results

Feel forward to the sharpness:

• Here's how to do it: Carefully place your thumb against the edge and pull it lightly across (never along).
• Result: If the edge feels smooth and round, the knife needs sharpening. If the edge "bites" lightly against the skin, it is still sharp.

2. The Paper Test – How to Reveal the True Sharpness of a Knife

A visual test that never fails:

• Here's how to do it: Hold a piece of newspaper or thin magazine paper. Place the knife at a 45-degree angle and cut through the paper from heel to tip.
• Result: If the knife cuts smoothly and without resistance, it is sharp. If it tears or snags, it needs sharpening.

3. The Pen or Nail Test – Safe and Effective

Perfect for a quick review:

• Here's how to do it: Place the knife against a plastic pen at a 45-degree angle and pull gently.
• Result: A sharp knife will easily "bite" into the plastic. If it slides without resistance, it needs a refresher.

4. The herb test - How gentle is your knife?

Test with delicate herbs:

• Here's how to do it: Roll up some herb leaves, such as basil, and cut into thin slices.
• Result: A sharp knife cuts evenly and preserves the color of the leaves. A dull knife crushes the herbs and causes discoloration.

5. The Tomato Test – The Classic That Everyone Knows

Perfect for quick checks:

• Here's how to do it: Try cutting a ripe tomato without applying pressure.
• Result: A sharp knife easily slides through the leather.

Keep your knives in top condition with Tomatosharp

No matter what method you use to test your knives, all knives will need sharpening over time to perform at their best.

At Tomatosharp We offer professional sharpening that gives your knives back the razor-sharp edge they deserve.

🔪 Visit us at tomatosharp .no and experience the difference. Let us help you make every cut a joy!